Available on js
@:value(cast "border")@:enum@:implinlineread onlyBORDER:CSSBoxType = "border"
@:value(cast "content")@:enum@:implinlineread onlyCONTENT:CSSBoxType = "content"
@:value(cast "margin")@:enum@:implinlineread onlyMARGIN:CSSBoxType = "margin"
@:value(cast "padding")@:enum@:implinlineread onlyPADDING:CSSBoxType = "padding"